Global Navigation Satellite Systems Engineering, Policy, and Design
The Agency for Restructuring and Modernization of Agriculture (ARMA), a government organization responsible for the supervision and control of European Union agricultural subsidies in Poland, has purchased 118 Spectra Precision MobileMapper 300 smart antennas.
By Inside GNSS
The Indian Space Research Organization (ISRO) announced the successful launch today (March 10, 2016) of the sixth satellite in the Indian Regional Navigation Satellite System (IRNSS).
IRNSS-1F lifted off at 4:01 p.m. IST from the Sriharikota rocket port in Andhra Pradesh on board the Polar Satellite Launch Vehicle (PSLV-C32). The 1,425-kilograpm spacecraft will be placed in geostationary orbit at 32.5 degrees East longitude.
By Inside GNSS
Dayton Convention Center, OhioThe JNC 2016 – Joint Navigation Conference will take place June 6-9, 2016 at the Dayton Convention Center in Dayton, Ohio. The annual event covers military navigation technology, "the Foundation for Military Ops."
By Inside GNSS
Old City Hall of The Hague, The NetherlandsUnder the auspices of the 2016 Dutch Presidency of the Council of the EU, the fourth edition of European Space Solutions will take place at the World Forum Convention Centre from May 30 to June 3, 2016 in The Hague, The Netherlands.
Online registration is available.
By Inside GNSS
The British Broadcasting Corporation (BBC) said yesterday (February 2, 2016) that the recent decommissioning of a GPS satellite led to difficulties for listeners receiving digital radio signals.
In a response to the reported issues, the BBC said: "The outages were caused by a rogue GPS satellite (SVN23), which was taken out of service in the evening of 26 January."
By Inside GNSS
SBAS and RNSS: The Unsung Heroes of GNSS
Okay, if I had wanted to pander to GNSS fans, I might have called this, “Making Great Greater.”
But there are only so many superlatives that can be lathered on this remarkable technology before simple praise turns into hagiography.
So, it’s time once more to give a little love to those unsung heroes of GNSS: the augmentations and regional navigation satellite systems.
By Inside GNSS
Swift Navigation’s Piksi GPS receiverHaving started out with a crowd source–funded launch through Kickstarter followed by two rounds of more conventional venture capital backing — $2.6 million in 2014 and another $11 million last December — San Francisco, California–based Swift Navigation is going after a low-cost, high-precision market such as unmanned aerial vehicles (UAVs) with its Piksi GPS receiver platform.
By Inside GNSS
GAGAN — India’s SBAS
Redefining Navigation over the Indian Region
Recognizing the potential benefits of satellite-based augmentation systems, India took the early initiative to create its own SBAS called GAGAN — GPS Aided Geo Augmented Navigation.
Working Papers explore the technical and scientific themes that underpin GNSS programs and applications. This regular column is coordinated by Prof. Dr.-Ing. Günter Hein, head of Europe’s Galileo Operations and Evolution.
With the support of the European Space Agency (ESA), a European team designed a frequency- and time-transfer process and validated its performance in a complex navigation test bed. This two-way time-transfer technology took advantage of the following:
By Günter W. Hein
Figure 1, 3, 4 & 5Q: What is Doppler collision and is it a problem in GNSS?
A: Doppler collision is a physical effect in code-division multiple access (CDMA) systems where code measurement errors are observed due to cross-correlation effects. Doppler collision may occur when the Doppler frequency between signals from two different transmitters is smaller than the code lock loop bandwidth.
By Inside GNSS
The GPS Aided Geo Augmented Navigation (GAGAN) system was developed by the Indian Space Research Organization (ISRO), together with Airports Authority of India (AAI), to deploy and certify an operational satellite-based augmentation system (SBAS). The system’s service area covers the Indian Flight Information Region (FIR), with the capability of expanding to neighboring FIRs.
By Inside GNSS
Figures and TablesIn satellite navigation, the user receiver finds its position by measuring its distance to satellites and knowledge of the satellite position. The distance is measured by ranging, i.e., finding the delay of the signal from the transmitter to the receiver. The delay will comprise of payload hardware delay and the geometric range delay. Hence, the payload delay of the signal from generation to radiation is very important and needs to be transmitted in navigation data.
By Inside GNSS
It will be a busy few weeks for GNSS satellite launches in January and February.
Up next is the Wednesday (January 20, 2016) is a launch of the fifth spacecraft for the Indian Regional Navigation Satellite System (IRNSS). The Indian Space Research Organization plans to complete the IRNSS constellation with two additional launches in February and March.
By Inside GNSS
